America's sweetheart Sandra Bullock just hit 51. And as you can tell by this photo, the Oscar-winning brunette seems to get even more beautiful with age. —XFINITY Entertainment Staff (Photo by Jason Merritt/Getty)

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Elle Macpherson, who turned 51 on March 29, hasn't lost her model looks. The gorgeous blonde, known in the fashion community as "The Body," is just as stunning as the day she first hit the catwalk. —XFINITY Entertainment Staff (Photo by John Sciulli/Getty Images)

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"Ugly Betty" and "Desperate Housewives" actress Vanessa Williams is anything but ugly or desperate. The 52-year-old has barely aged since her days as Miss America in the early 1980s. —XFINITY Entertainment Staff (Photo: Stephen Lovekin/Getty Images)

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Actress Jennifer Grey, best known for playing Baby in "Dirty Dancing," and as the winner of season 11 of "Dancing with the Stars," turned 55 on March 26. —XFINITY Entertainment Staff (Photo by Alberto E. Rodriguez/Getty Images)

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"The New Adventures of Old Christine" actress definitely doesn't look old. Louis-Dreyfus appears to look exactly the same as she did more than a decade ago on "Seinfeld." —XFINITY Entertainment Staff (AP Photo/Dan Steinberg)

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Marrying the biggest bachelor in Hollywood (and having four children) has certainly had a youthful effect on 57-year-old Annette Bening. —XFINITY Entertainment Staff (Photo by Frazer Harrison/Getty Images for AFI)

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The two-time Oscar winner has packed a lot into her near five-decade-long career. Jodie got her showbiz start as a 3-year-old Coppertone girl, and eventually went on to star in TV and film. This thinking-man's screen queen continues to be active in Hollywood. —XFINITY Entertainment Staff (Photo by Jason Kempin/Getty)

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